Lock



April 3, 192s. 4 1,665,016

E. M. BENHAM ET AL LOCK Filed June 12. 1926 Patented Apr. 3, 1928.

UNITED STATES PATENT OFFICE.

EDGAR M. BENI-IAM, OF NORWOOD, AND GEORGE J. BAUER, OF MADISONVILLE, OHIO,

ASSIGNORS TO THE MOSLER LOCK COMPANY, OF COVINGTON, KIEZNZIUVCKY,Y A. COR- PORATION OF OHIO.

LOCK.

Application filed .Tune 12, 1928. Serial No. 115,443.

This invention relates to locks, and more particularly relates to locks especially suited for safety deposit lock boxes, and to the type which permits the customers key to be placed in a sealed envelope at the factory and not to be removed therefrom until the key is delivered to the customer.

T he principal object of our invention is to improve upon the construct-ion of locks of l" this character, with the view of obtaining concealment of the serial number of the customers key until it is desired to deliver this key to the customer. A further object of our invention is to provide a lock of the l5 character described, which gives added protection and security against being unlocked by an authorized person, or by means oi unauthorized instruments. A further object of our invention is to provide a simpli- 0 tied lock construction, which does not require the use ot' the customers key for partially locking it for shipping or for unlocking and relooking it ut will pending renting of the safety deposit lock box to which the lock is applied, but which cannot be un locked without the customers key after the serial munber oit such key has been ascertained. Other objects of our invention Will be in part obvious and in part pointed out hereinafter.

1n accordance with our invention, We utilize a construction resembling the construction disclosed in patent to Edgar M. Benham, No. 1.522,7 52, issued January 13, 1925,

Si for locks, and apply to such a construction a special tumbler, on the underside of which is marked the serial number of the customers key for the particular lock, and provide an aperture in the rear Jface of the lock 4U caffe, through which -this number is visible,

but only when the tumbler has been manipulated into a certain position. Means are provided for preventing this tumbler from so exposing the serial number until the lock has been put in such condition that the customers key is required to unlock the same. The lock is constructed that, prior to the exposure of the serial number, the lock may be partially locked and unlocked to permit the door of the box to which the lock is ap- In order that a clearer understanding of our invention may be had, attention is hereby directed to` the accompanying drawings, forming a part of this application and illustrating one possible embodimenty oit' our invention.

Referring to the drawings, Fig. 1 is a top elevation of a lock embodying our invention, the bolt bar being shown partially projected; Fig. 2 is a rear vienl of the same, partially broken away to show the serial numbei' of the customers key marked on the special tumblgr; Fig. 3 is a sectional view ot' the lock, showing the special tumbler eX- posed, the bolt bar being partially projected by means of the temporary guard key and the dummy key; Fig. 4 is a view similar to F ig. 3, but shows the bolt bar fully projected and the special tumbler pivoted by means of the permanent guard key to expose the serial number of the customers key; Fig. 5 is a side elevation of the temporary guard key; Fig. 6. isa side elevation of the permanent guard key; and Fig. 7 is a side elevation of the dummy key.

Similar reference characters refer to similar parts throughout the several views 0f the drawings.

As before stated, the lock comprises a suitable casingv 1, cover plate 2, slidable bolt bar 8, having a. bolt portion 4 and locking stump 5, master key tube 6, with cam 7, for operating the bolt bar, guard key tube 8, and alternately nested guard tumblers 8 and master tumblers 6 commonly pivoted on a post 9, in a manner resembling that disclosed in said Patent No. 1,522,752.

In accordance With the present invention, a special tumbler 10 is pivoted on the post 9 intermediate the bolt bar 3 and the stack of master and guard tumblers. This special tumbler has a tail portion 11, which comes adjacent the guard key tube 8, so that the tumbler may be pivoted by means of a proper key turned in this key tube. rlhe nose 12 of this special tumbler has two recesses, one ot which, 13, is normally in alignment with the locking' `stump 5, and the other recess 1li being adapted to be aligned with the locking stump 5 only after the locking stump 5 has been withdrawn lfromA the recess" n13 and the tumbler pivoted by means of the proper key operating in key tube 8. rlfhe back of the case 1l is pro vided with an aperture 15, and the special tumbler 10 is marked on its under-tace with the serial number ci the customers key intended for the lock, as at 16. VThe aperture 15 is so vpositioned that in the normal posin tion ot the tumbler 10, the serial number thereon is not visible therethrough, and'is only visible after this tumbler has been pivoted in the manner above described.

The rear of the lock is provided with another aperture 17,. in' which is `seated normally the head 18 of ya screw 19, which is in threaded lengagei'nent withthe bolt bar. The relative shapes and sizes ot the aperture 17 and screw head 18 are such that the bolt is permitted partial reciprocation, just enough to take the locking .stump 5 out of engagement with the guard tumblers 8', butnot enough to take the locking stump out ot engagement with the master tumbler-s 6, nor out ot 'engagement with the recess 13 of the special tumbler 10, Only after screw 19-has been removed may the bolt bar be fully projected, in which case the special tumbler 1,0 will be released, but the master tumblers will also have been upset, so as to require the use ot the customer-s key before the lock may be unlocked.

Preferably, the special tumbler 10 is provided with a portion 20, which, in the nor# mal position of this tumbler, is closely ad jacent the front side of key tube 6 and in the path of a key being inserted into this key tube when the lock is in fully locked condition. Thus, when the tumbler is in this position, neither the customers key, nor any other key, can be inserted to the ull extent intoA this key tube until the tumbler 10 has been pivoted to remove its obstructing portion 20. This requires a special key, operable inkey tube 8, for pivoting the tumbler 10 to displace this obstructing portion from the path ot a key into the key tube 6. How-ever, unlessthe bolt bar is fully projected, such key tor the tumbler 10 cannot be operated, on account Vot the engageM ment of the locking stump 5 in the recess 13 of'this tumbler. t will be apparent that when the tumbler 10 is pivoted in the proper manner, the serial number of the customers key will be visible through the aperture 15 of the lock case, and at the same time the obstruction 20 to the entrance or" the customrecente ers key will be displaced, and the recess lil ot this tumbler will be aligned with the locking stumpV 5.

lViren the lock is shipped from the factory, the screw 19 is in place, and the locking stump is engaged in the recess 13 of the special tumbler 10, and thus the lock is in partially locked condition, asshown in Figs. 1 and 3. The customers key is preferably placed ina sealed V envelope at the factory, and the serial number is marked on the outside ot the envelope. Thereafter the custodian 01" the bank may unlock the lock and restore it to partially locked condition at will by means ot a temporary guard key 21, inserted in key tube 8, and a dummy key 22, or other instrument inserted in key tube 6, whereby the key tube 8 may be rotated. Vif'he temporary guardv key is cut Lmay, as at 24so as to escape the tail 11 ot the special tumblerV 10, for otherwise the key `could not be turned, due to the engagement ot this tumbler with the locking stump 5. yl`his temporary guard key, however, sets up all ot the guard tumblers, and since the locking stump holds all the master tumblers in alignment While the screw 19 is in place, the bolt bar may be projected tor the distance permitted by the screw 19, and may be retracted by means of dummy key When it is desired to place the lock in condition lor operation requiring the use of the customers key, screw 19 is removed, and the bolt bar is fully projected by means ot the dummy key 'this movement of the Vbolt bar upsets all the master tumbler-s, and withdraws the locking stump 5 out of the recess 13 ol the special tumbler 10. A permanent guard key 25 is now inserted into the guard key tube 8 and rotated. rlhis permanent guard key has a bit 26, which engages the tail 11 ol the special tumbler l() and causes this tumbler to pivot about the post 9. The serial number of the customers key is now ascertained by looking through the aperture 15 in the rear ot the lock; the sealed envelope marked with the corresponding number is obtained, and the key delivered to the customer. The lock now cannot be unlocked by means oi' the dummy key, because this key is not capable of setting up the master tumblers. The lock, however, can be locked and unlocked by means of customerls key, but onlyl after the guard tumblers have been set up and the special tumbler 10 pivoted to remove its portion 20 out ot position obstructing the placement et the customers key fully into the lock. lll/Then the customers key does not enter the lock to the i'ull extent, its bits will not align properly with the master tumblers to set them up. Y

As many changes could be made in the above construction and as many apparently Widely different' embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

That We claim is l. In a lock of the character described, in combination, a casing having an aperture, a bolt barslidable in the casing, a guard tumbler for (logging the bolt bar, a special tum-bler having a Ikey designating mark positioned to be invisible through said aperture inthe normal position of the tumbler, said tumbler being movable into position exposing said mark at said aperture, said guard tumbler being movable by means of a key independently of said special tumbler, and said guard tumbler being movable and said special tumbler being disposable into position exposing the mark at the aperture simultaneously by means of another key.

2. In a lock of the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, a guard tum blerior clogging the bolt bar, a special tumbler having a key designating markpositioned to be invisible through said aperture in the normal position of the tumbler, said tumbler being movable into position exposingsaid mark at said aperture, said guard tumbler being n'iovable by means ot a key independently of said special tumbler, and said guard tumbler being movable and said special tumbler being disposable into position exposing the mark at the aperture simultaneously by means oit another key, and releasable means for locking said special tumbler against movement.

In a lock of the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, a guard tumbler-for clogging the bolt bar, a special tumbler having a key designating mark positioned to be invisible through said aperture in the normal position of the tumbler, said tumbler being movableV into position exposing said mark at said aperture, said guard tumbler being movable by means of a key independently of said special tumbler. and said guard tumbler being movable and said special tumbler being disposable into position exposing the mark at the aperture simultaneously by means of another key, and releasable means for locking said special tumbler against movement, said means including a projection on the bolt engaging in a recess in the special tumbler.

4. In a lock of the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, a guard tumbler -for clogging the bolt bar, a. special tumbler having a key designating mark posi-` a bolt bar slidable in the casing, a guard tumbler `for dog-ging the bolt bar, a special tumbler having` a. key designating mark positioned to be invisible through said aperture in the normal position of the tumbler, said tumbler being movable int-o position exposing said mark at said aperture, a recess in said special tumbler, a locking stump on the bolt` bar engageable in said recess, and temporary means preventing sufficient projection ot the bolt bar to remove the locking stump out ot said recess, whereby said mark is retained invisible so long as said temporary means function, said temporary-4 means comprising a removable stop on said boltbar and having a portion disposed in a slot in the lock casing.

(i. In. a lock of the character described, in combination. a casing having an aperture, a bolt bar slidable in the casing, a guard tumbler for dogging the bolt bar, a special tumbler having a key designating mark positioned to be invisible through said aperture in the normal position of the tumbler, said tumbler being movable into position exposing said mark at said aperture, a recess in said special tumbler, a recess in said guard tumbler, a locking stump on the bolt bar engageable in said recesses, said special tumbler projecting further than the guard tumbler toward the locking stump, and temporary means preventing suiicient projection of the bolt bar to remove the locking stump from the recess of the special tumbler and permitting sufficient projection of the bolt bar to remove the locking stump from the recess of the guard tumbler.

7. In a lock of the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, a guard tumbler for clogging the bolt bar, a special tumbler having a key designating mark positioned to be invisible through said aperture in the normal position ot the tumbler, said tumbler being movable into position exposing said mark at said aperture, a. recess in said special tumbler, a locking stump on the bolt bar engageable in said recess, and temporary means preventing sullicient projection ot the bolt bar to remove the locking stump out of said recess, whereby said mark is retained invisible so long as said temporary means function, said temporary means being adjustable to permit sufficient projection of the bolt bar to remove the locking stump out of the recess in the special,

ing said mark at said aperture, a recess in said special tumbler, a recess in said guard tumbler, a locking stump on the bolt bar engageable in said recesses, said special tumbler projecting further than the guard tun'ibler toward the lockingstump, and temporary means preventing suilicient projection of the bolt bar to remove the locking stump from the recess ol the special tumbler and permit# tingsuticient projection oi' the bolt bar to remove the locking stump from tl e recess ot the guard tumbler, said temporary means being adjustable to permit suilicient .projection ot the bolt bar to remove the locking stump out oi the recess in the special tum bler. Y

9. In a lock olE the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, master tumbler tor dogging the bolt bar, a special tumbler having a key designating mark posi* tioned to be invisible through said aperture in the normal position of the tumbler, said tumbler being movable into position exposing said mark at said aperture, each of said tumblers 'having a recess, a locking stump on the bolt bar engageable in said recesses, said tumblers extending the same distance toward the locking stump, whereby any projection ot' the bolt bar sufficient to remove the stump from the special tumbler recess removes the stump also from the master tumbler recess.

l0. In a lock of the character described, in combination, a casing having an aperture, abolt bar slidable in the casing, a master tumbler for clogging therbolt bar, a special tumbler having a key designating mark positioned to be invisible through said aperture in ther normal position of the tumbler, said tumbler being movable into position exposing said niark at said aperture, each ot said tumblers having a recess, a locking stump on the boltbar engageable in said recesses, said tumblers extending the same distance toward the locking stump, whereby any projectionoil the bolt bar sufficient to remove the stump from the 'special tumbler recess removes the stump also from the master tumbler recess, and temporary means preventing suttlcient projection ot the bolt bar tumbler tor clogging the bolt bar, a special tumbler having a key designating mark positioned to be invisible through said aperture in the normal position of the tumbler, said tumbler being movable into position exposing said mark at said aperture, each of said tumblershaving a recess, a locking stump on thecbolt bar engageable in said recesses, said tumblers extending the same distance toward the locking stump, whereby any projection ot' the bolt bar suiiicient to removethe stump from the'special tumbler recess removes the stump also4 trom the master tumbler recess, a key tube from' which the master tumbler and the bolt bar may be operated, and another key tube trom which the special tumbier may be operated. n

l2. in a lock or" the character described, in combination, a casing having` an aperture, a .bolt4 bar siidable in the casing, a master tumbler vfor clogging the bolt bar, a special tumbler having a key designating mark posi tioned to be invisible lthrough said aperture inthe normal position of the tumbler, said tumbler being movable into position exposing said mark at said aperture, each of said tumblers having Va recess, a locking stump on thebolt bar engageable in said recesses,

said tumblers extending the same distancetoward the locking stump, whereby anyprojection of the bolt bar suicient to remove the stump from the special tumbler recess removes the stump also from the master tumbler recess, temporary means preventing sufficient projection ot' the bolt bar to remove the stump from the recesses of said'tumblers, a guard tumbler projecting ,a less distance toward the locking stump than the master and special tumblers and having a recess :tor the stump, and said temporary means permitting suliicient movement of the bolt bar to remove the stump from the iecess of the guard tumbler. 13. ln a lock of the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, amaster tumbler for dogging the bolt bar, a special tumbler having a key designating mark positioned to be invisible through said aperture in the normal position ot the tumbler, said tumbler being movable into position exposingsaid mark at said aperture, each of .said tumblers Vhaving a recess, a locking stump on tliebolt bar engageablein said recesses, said tumblers extending the same distance toward the locking stump, whereby any projection ot the bolt bar suiicient to remove iso ' the stump from the special tumbler recess move the stump from the recess of the guard tumbler, and a key for setting up said guard tumbler without engaging said special tumbler.

14.y In `a lockiof the character described, in

f combination, a casing having an aperture, a

boltbar slidable in the casing, a master tumhlerfor dogging the bolt bar, a special tumbler having a key designating mark positioned to be invisible -through said aperture in the normal position of the tumbler, said tumbler 'being movable into position exposing said mark at said aperture, each of said tumblers having a recess, a locking stump on the bolt bar engageable in said recesses, said tumblers extending the same distance t0- rvard the locking stump, whereby any projection of the bolt-bar suieient to remove the :stump from the speci-al tumbler recess removes the stump also from the master tumbler recess, temporary means preventing sufficient project-ion of the bolt bar to remove the stump from the recesses of said tumblers, a guard tumbler projecting a less distance toward the locking stump than the master and special tumblers and having a recess for the stump, said temporary means permitting sufficient movement of the bolt bar to remove the stump from the recess of the guard tumbler, a key for setting up said guard tumblerwvithout engaging said special tumbler, and a dummy key for reciprocating said bolt bar Without engaging said master tumbler.k

15. In a lock ofthe character described, in combination, a casing having an aperture, a bolt bar slidablein the casing, a master tum- V"bler `for dogging the bolt bar, a special tumbler having a key designating mark positioned to be invisible through said aperture in the normal position of the tumbler, said .tumbler lbeing movable into position eXposing said mark at said aperture, each or said tumblers having a recess, a locking stump on the bolt bar engageable in said recesses, said ytumblers extending the same distance toward the locking stump, whereby any projection of the bolt lbar suticient to remove the stump from 'the special tumbler recess removes the stump also from the master tumbler recess, 'temporary means preventing suiiicient projection of the bolt bar to remove the stump from the recesses of said tumblers, a guard tumbler projecting a less dista-nce toward the locking stump than the master and special tumblers and having a recess for the stump, and said temporary means permitting suficient movement oi the bolt bar to remove the stumpirom the recess of the guard tumbler, said temporay means being removable to permit full projection of the bolt.

1G. ln a lock ot the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, a master tumbler for clogging the bolt bar, a special tumbler having a key designating mark positioned tobe invisible through said aperture in the normal position or the tumbler, said tumbler being movable into position exposing said mark at said aperture, each of said tumblersl having a recess, a locking stump on the, bolt bar engageable in said recesses, said tumblers extending ,the same distance. toward the locking stump, whereby any projection of the bolt bar sutticient to remove the stump from the special tumblerrecess removes the stump also from the master tumbler recess, temporary means preventing suiiicient projection or' the bolt bar to remove the stump from the recesses of saidtumblers, a guard tumbler projecting a less distance toward the locking stump than the master and special tumblers and having a recess for the stump, and said temporary means permitting sutilcient movement of the bolt bar to remove the stump from the recess of the guard tumbler, said temporary means being removable to permit full projection of the bolt, a temporary guard key for setting up said guard tumbler without engaging said special tumbler when the bolt bar is only partially projected, and a permanent guard key engaging both the guard and special tumblers for setting them up simultaneously when the bolt bar is fully projected.

l?. In a lock oi the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, a master tumbler for clogging the bolt bar, a special tumbler havingn a key designating mark positioned to be invisible through said aperture in the normal position or the tumbler, said tumbler being movable into position exposing said mark at said aperture, each of said tumblers having a recess, a locking stump on the bolt bar cngageable in said recesses, said 'tumblers extending the same distance toward the locking stump, whereby any projection of the bolt bar suflicient to remove the stump from the special tumbler recess removes the stump also irom the master tumbler recess, temporary means preventing sutlicient projection of the bolt bar to remove the stump trom the recesses of said tunixblers, a guard tumbler projectiney a less distance toward the locking stump tlian the master and special tumblers and having a. recess `ior the stump, and said temporary sai bar is only'partially projected, and a per# means permitting suicient movement ofthe bolt bar to remove the stump from the recessof the guard tumbler, said temporary means beingremovable to permit full projectionof the bolt, a temporary guard key for setting up said guard tumbler without engaging said special tumbler when the bolt manent guard key engaging both the guard andspecial tumblers for setting them up lsimultaneously whenV the bolt bar is fully projected, said special tumbler having a second recess positioned to align with the locking stump when said tumbler is set up by means otw the permanent guard key.

` 18. In a llock of the character described, in combination, a casing having an aperture, a bolt bar slidable in the casing, a master tumblerffor dogging the bolt bar, a special tumbler having a key designating mark positioned lto be invisible through said aperture in the normal position of the tumbler, said tumbler `being movable into position lexposing said'marlcat said aperture, each ot said tumblers having al recess, a locking stump on the ,bolt bar engageable in said recesses, said tumblers extending the same distance toward the locking stump, whereby any projection of the bolt bar suicient to remove the stump from the special tumbler recess removes the stump also from the master tumbler recess, temporary means preventing suflicient projection of the bolt bar to remove the stump from the recesses of said tumblers, a guard tumbler projecting a less distance toward the locking stump than the master and special tumblers and havingra recess for the stump, and said temporary means permitting sufficient movement of the bolt bar to remove the stump from the recess of the" guard tumbler, said temporary means being removable to permit full projection of the bolt, whereby said guard tumbler may be set up by means of a temporary guard key independently oi' said special tumbler when the bolt bar is only partially projected, and both the guard and special tumblers may be set up simultaneously by Ymeans of a permanentA guard key when the bolt bar is fully projected, and the bolt bar may be reciprocated by means of a dummy key, while the master tumbler is set up, and the master tumbler may be set up and the bolt bar reciprocated by means of a custom- `ers key when the bolt bar is fully projected.

19. In a lock of the character described, in

combination, aV casing having an aperture, a

bolt bar slidable in the casing, a master tumbler for clogging the bolt bar, a special tumbler having a. key designating mark positioned to beinvisible through said aperture in the normal position of the tumbler, said tumbler being movable into position exposing said mark at said aperture, each of said tumblers having a recess, a locking stump on the bolt bar engageable in said recesses, a key tube from which the master tumbler may be operatedand having a cam for reciprocating the bolt bar upon rotation v'of the tube, said special tumbler having a portion positioned in the keyway oit said tube obstructing `full insertionof a key in said key tube unt-il said special tumbler is actuated toV remove said obstructing portion from the keyway.

' 20. In a lock of the character described, in combination, a casing having'an'aperturo, a bolt bar slidable in the casing, a master tumbler for dogging the bolt bar, a s ecial tumbler having a key designating marA positioned to be invisible through said aperture in the normal position of the tumbler, said tumbler being movable intov position exposing said mark at said aperture, each of said tumblersV having'y a recess, a vlocking stump on, the bolt bar engageablein said recesses, said tumblers extending the; same distance Vtoward the locking stump, whereby any projection of the bolty bar sufficient to remove the stump Vtrom the special tumbler recess removes the stump also Jfrom the master tumbler recess, and temporary means preventing suiiicient projection 'of the bolt bar to remove the stump from the recesses ot said tumblers, ai key tube from which the master tumbler may be operated andhaving acam for reciprocating the bolt bar upon rotation of the tube, said special tumbler having a portion positioned in the keyway of said tube obstructingv full insertion of a key in said key tube until said special tumbler is actuated to remove saidV obstructing portion from the keyway. Y `j 21.A In a lock of the character described, in combination, a casing having an aperture,a bolt bar slidable in the casing,V a'master tumbler for dogging the bolt bar, a special tumbler having a key designating Ina-rkA positioned to be invisible through said-aperture in the normal position of the tumbler, said tumbler being movable into position exposing said mark at said aperture, each-of said tumblers having la recess, aflocking stumpon the bolt bar engageable Lin said recesses, said tumblers extending the same distance toward the locking stump, whereby any projection of the bolt bar 'suiiicient to remove the stump from the special tumbler recess removes tumbler, said temporary means being removable to permit full projection of the bolt, whereby said guard tumbler may be setup by means of a temporary guard key independently of said special tumbler when the bolt bar is only partially projected, and both the guard and special tumblers may be set up simultaneously by means of a permanent guard key when the bolt bar is fully projected, said special tumbler having a second recess positioned to align with the locking stump when said tumkey in said key tube until said special tumbler is set up by means of the permanent bler is actuated to remove said obstructing l0 guard key, a key tube from which the masportion from the key-Way. ter tumbler may be operated and having :i This specification signed this 7th day of 5 cam for reciprocating the bolt bar upon ro- June, 1926.

tat-ion of the tube, Said special tumbler having a portion positioned in the key-way of EDGAR M. BENHAM. seid tube obstructing full insertion of the GEORGE J. BAUER. 

